Yahoo - The Internet company named Henrique de Castro as its new COO. De Castro was most recently vice president of Google's worldwide Partner Business Solutions group. (Click here for after-hours quote.)

WD-40 - The household-product maker posted earnings of 56 cents a share on sales of $85 million. Analysts expected the company to post earnings of 70 cents a share on revenue of $94 million. In addition, the company's full-year 2013 revenue guidance came in at the low end of expectations. Shares tumbled in extended-hours trading. (Click here for after-hours quote.)

Bankrate- The consumer financial-services company announced that its third-quarter results will not meet Wall Street estimates. Shares plunged in after-hours trading, extending losses after hitting an all-time low in regular hours trading. (Click here for after-hours quote.)

Bridgepoint Education - The for-profit education company said the U.S. Department of Justice was investigating the compensation of its admissions personnel. Shares slumped in extended-hours trading. (Click here for after-hours quote.)

Thor Industries - The RV maker announced CFO Christian Farman has left the company to pursue other opportunities. Colleen Zuhl will serve as the firm's interim CFO. (Click here for after-hours quote.)

Illinois Tool Works - The manufacturing conglomerate promoted Scott Santi to President and COO. Santi will also serve as acting CEO as David Spear takes a health-related leave. (Click here for after-hours quote.)

Walter Investment Management - The business-solutions provider announced a secondary offering of 4.5 million shares of common stock and an offering of $265 million in convertible senior subordinated notes due in 2019. (Click here for after-hours quote.)